If it weren't for the harsh Russian winter and the English channel, could've Napoleon succeeded in his conquest? I've even heard that all the people in England would have been speaking English if it weren't for the channel. And also was it a great honor to have your ear pulled by Napoleon?
Questions around geographical hypotheticals (what if the English Channel didn't exist? And if Russia was 10x smaller and had a different climate?) aren't something that historians like to dwell on. Geography is usually taken as a given/constant.
Napoleon's greatest enemy was likely himself. Politics is the art of the possible. Conquering and maintaining control of an entire continent was just not possible, no matter how gifted of a general Napoleon was. Napoleon failed to see that, and continued to expand his empire while imposing harsh terms on other powers. It was just a matter of time before he overextended.